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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › putting in after-run oil, compressing ok?
04-25-2011 03:28 AM  7 years agoPost 1
mustang67ford

rrKey Veteran

Central Pennsylvania

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I have been looking at different ways to get the after-run engine oil in my os 32,37 and 55 because of the bearing failure being such an issue (I know the 32 does not have the bearing issue thought). I am currently removignt he glow plug and putting it in that way. If I just squeeze it in using the bottle, there is know way to tell how much is going in. I bought 2 glass droppers from walmart so I fugured, 1 squeeze full should be enough after each run. However, once I put it in the hole and put the plug in, how do you get it down onto the bearing? I'm sure the oil does not compress well so would durning the motor over damage it? I know the best way is to probably remove the backplate, but this is tough; especally with OS and the gasket on the backplate. I was trying to find some type of seringe to put the oil in, but the droppers were the best I could find.

Also, after I am done for the day, I am getting into the habbit of filling up and draining the tank to purge it. Once I get rid of the after-run oul bottles I have, I am going to start using the air tool oil.

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04-25-2011 11:41 AM  7 years agoPost 2
MartyH

rrProfessor

USA

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Can you store your heli inside the house? That will help the engine, electronics and the heli hardware a lot. Afterun oil isn't needed if you run Wildcat Fuel they claim and I can confirm. I have a fleet of nitro helis and run only Wildcat and have no bearing issues in any of my engines. The best thing you can do is run the engine until it quits so then briefly put glow back on it and try to start it to light off any residue. I dont even do this. If I was afterun oiling an engine I dont think I'd keep cycling my backplate off. How about squeezing a little into the fuel line to the carb and then using the starter to crank it into the engine? I don't see why compressing it would hurt anything. It certainly would help distribute the oil well. These are not diesel engines so we're not talking about a ton of compression.

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04-25-2011 12:26 PM  7 years agoPost 3
mustang67ford

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Central Pennsylvania

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OS engines are known for bearing issues. Can't put the oil in thru the fuel line because it hurts the seals. I do store my heli inside.

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04-25-2011 01:17 PM  7 years agoPost 4
MartyH

rrProfessor

USA

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All my heli engines except one are OS. 37, 61, 70 and 91. The only bearing issue I have ever heard of with the OS engines is the 50 from guys trying to ring that last rpm out of them. If the afterun oil will hurt seals, what's the point? Surely fumes if not liquid will reach the carb and would surely seap to the outer bearing seal as well.
With your concerns I guess through the glowplug hole is going to be the best way to go then. Again, compressing it in the engine shouldnt hurt a thing. Just don;t hydro lock it of course.

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04-25-2011 01:54 PM  7 years agoPost 5
Frank Bostwick

rrElite Veteran

Cincinnati Ohio

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Im with Marty on this one. In the past I used AF oil but dont any more. I fill the tank and thats it. BTW I agree only the OS50 series really have a bearing issue. The OS37 is one of the best motors ever made, its so easy to fly and maintain its hard to believe. I couldnt count the gals I had thru my last one but it was dozens and it flew like new.

RIP ROMAN

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04-25-2011 05:56 PM  7 years agoPost 6
smh20502

rrNovice

Houston, Texas

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Initially I used to use after run oil then later found it didn't make any difference for me so I quit. It seems now with the quality fuels out there, AR oil isn't as necessary if at all.

In regards to bearings...your 55 will go through them rather quickly as compared to other engines. I've had them go as quickly as 2 gallongs but that's not typical but generally I've got better than that. (hard to tell...too many crashes)

Do not use the Ceramic bearings...then they go you basically buy another engine. Just get the stainless steal and you'll be fine.

Common sense isn't so common. Yes, there are stupid questions

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04-29-2011 06:56 PM  7 years agoPost 7
Swoop

rrElite Veteran

Newark, DE USA

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I've installed nipples in the backplates of both my 50 and 55. I hold the heli, skid down and use a syringe to inject 6cc. Then turn the engine over (with plug removed). This is enough oil to actually puddle around the bearing, and turning the engine over thoroughly flushes it.

My 55 is too new to tell, but this has significantly lengthened the life of my 50 (not one spec of spot rust on the crank yet).

The downside is that the heli will hydrolock if you don't flush the oil out the glow hole before trying to start.

Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35

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